﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ExampleClass
{
    class Rectangle
    {
        int x;
        int y;
        public void SetValues(int a, int b)
        {
            x = a;
            y = b;
        }
        public int area()
        {
            return (x * y);
        }
    }

    class Program
    {
        static void Main(string[]args)
        {
            Rectangle recta=new Rectangle();
            Rectangle rectb=new Rectangle();
            recta.SetValues(3,4);
            rectb.SetValues(5,6);
            Console.WriteLine("rect a:{0}",recta.area());
             Console.WriteLine("rect b:{0}",rectb.area());
        }
    }
}